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33 results on '"Tatina, Robert"'

3. A Do-It-Yourself Pipette Washer.

Author

Tatina, Robert

Abstract

Describes an automatic pipette washer that is functional, inexpensive, and easy to construct from locally available parts. (KHR)

Published
2002

4. Phosphate Uptake in Carrot and Yeast.

Author

Tatina, Robert, Mansor, Marcy, and Maier, Sarah

Abstract

Presents a student laboratory investigation that tests hypotheses about the uptake of phosphate ions by carrots and yeast. (ASK)

Published
2001

5. A Colorimeter for Measuring Phosphorous in Solution.

Author

Tatina, Robert

Abstract

Describes the construction and use of an inexpensive colorimeter that reliably estimates the phosphorus concentrations in water. Presents a two-step modification to an existing photometer. (SAH)

Published
2001

6. A Photometer for Measuring Population Growth in Yeast.

Author

Tatina, Robert, Hartley, Tamela, and Thomas, Danita

Abstract

Describes the construction and use of an inexpensive, portable photometer designed specifically for estimating population sizes in yeast cultures. Suggests activities for use with the photometer. (WRM)

Published
1999

7. Osmosis in Poisoned Plant Cells.

Author

Tatina, Robert

Abstract

Describes two simple laboratory exercises that allow students to test hypotheses concerning the requirement of cell energy for osmosis. The first exercise involves osmotically-caused changes in the length of potato tubers and requires detailed quantitative observations. The second exercise involves osmotically-caused changes in turgor of Elodea species leaves. (PVD)

Published
1998

8. A Submersible Light Sensor for Aquatic Ecology.

Author

Tatina, Robert

Abstract

Describes the construction of an inexpensive light sensor that can be used to measure irradiance in aquatic habitats. Includes a list of tools and materials, details of construction, and usage of the light sensor. (DDR)

Published
1998

9. A Simulation of Coevolution Using Playing Cards

Author

Tatina, Robert

Abstract

In this article, the author describes a simulation of a coevolutionary "arms race" and introduce a way of teaching it that lets students use the theory of natural selection to explain the outcomes of the simulation. The simulation uses the numerical cards from an UNO[R] playing card deck to represent the speeds of individuals in populations of predators and their prey. Simple descriptive statistics are then used to illustrate changes in the two populations. He discusses the simulation process and the rules of play. He also presents a post-game discussion. (Contains 2 tables.)

Published
2007

10. A do-it-yourself pipette washer

Author

Tatina, Robert

Subjects
Tubes -- Maintenance and repair, Cleaning machinery and appliances -- Design and construction
Published
2002

11. Phospate uptake in carrot and yeast

Author

Tatina, Robert, Mansor, Marcy, and Maier, Sara

Subjects
Biology -- Tests, problems and exercises, Cellular control mechanisms -- Study and teaching, Biological transport, Active -- Study and teaching, Phosphates -- Tests, problems and exercises
Published
2001

16. A simulation of co evolution using playing cards

Author

Tatina, Robert

Subjects
Evolution -- Study and teaching -- Educational aspects, Simulated environment (Teaching method) -- Management -- Study and teaching -- Educational aspects, Cards -- Educational aspects -- Study and teaching, Biological sciences, Education, Company business management, Management, Educational aspects, Study and teaching
Abstract

Because of its ability to unite so many disparate facts and concepts, the theory of descent with modification is considered the linchpin of biology (Dobzhansky, 1973). One of the more [...]

Published
2007

19. A Technique for Staining Pollen Nuclei.

Author

Tatina, Robert and Hohn, Kevin

Abstract

Uses diagrams to aid in describing a simple, rapid technique for staining the nuclei of pollen grains that have been germinated in vitro. (ZWH)

Published
1994

20. Enzymatic Inquiry.

Author

Tatina, Robert

Abstract

Describes an inquiry lab that helps students discover the chemical nature of enzymes. (PR)

Published
1993

23. A technique for staining pollen nuclei

Author

Tatina, Robert and Hohn, Kevin

Subjects
Palynology -- Tests, problems and exercises, Biology -- Study and teaching, Phanerogams -- Tests, problems and exercises, Stains and staining (Microscopy) -- Methods
Published
1994

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